Diaphragm-horn.



H. W. BENDER.

DIAPHRAGM HORN.

APPLICATION FILED APR.26.1912.

1,129,642, Patented Dec. 8, 1914.

UNITED STA TES PATENT GEE 16E.

HENRY W. IBEND ER, OF BROQKLYN, NEXV YORK, ASSIGNOR. BY MESNE ASSIGNMENTS,

'IO LOVELL-MCCONNELL MANUFACTURING CG 'PANY, A CORPORATION OF DELA- WARE.

DIAPHRAGM-HORN.

To all whom it may concern:

Be it known that I, IIENRY W. BENDER, a citizen of the United States, and resident of the city of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in DiaphragmHorns, of which the following is a specification.

My invention relates to certain improvements in diaphragm horns of a type commonly employed as warning signals on automobiles or other vehicles and in which the sound is produced by vibrations of the diaphragm.

One of the main objects of my invention is to simplify the construction and reduce the cost of manufacture by employing the minimum number of parts arranged in as compact and simple form as possible.

A further object of my invention is to facilitate the securing of the proper adjust-I ment of the diaphragm vibrating member;

and the diaphragm without interfering with the proper driving connections between said member and the source of power.

On the drawing which illustrates a pre ferred form of my invention and in which the same numerals indicate the' same parts throughout the several views. Figure 1 is a perspective view of my improvedhorn; Fig. 2 is aside elevation of the operating mechanism, the inclosing parts being in section; and Fig. 3 is a transverse section on the line 3-3 of Fig. 2.

Referring particularly to the drawings, 1 indicates an annular base having a central opening from which extends a trumpet or projector 2. The base carries a metaldiaphragm 3 secured to a shoulder lby any form pf fastening means such as a retaining ring 5, and'this diaphragm is provided at its. center with a wear piece or impact piece:

For supporting the diaphragm vibrating mechanism, I provide a very simple'form of frame adjustable toward andfrom the diaphragm. This frame is in the form of a yoke and is carried by a pair of lugs I having outturned ends 8 secured to the base 1..- By locating these'lugs as shown in Fig. 3, the ends 8, engage the ring 5 and project inward beyond the same The outer ends of the lugs'are perforated to act as bearings for a spindle 9, which serves as means for pivotally mounting the frame or yoke 10,

Specification of Letters Patent.

Patented Dec. R. 1914.

the latter having apertures in the ends of its arms to receive the spindle. For adj lutmg the spindle about its pivotal support it is provided at its outer end with a stem or shank 11 slotted at 12 to receive a pin 13 carried by a fork 14 at the inner end of a bolt 15. The shank fits. into the fork l4, and the bolt passes through a smooth opening in the base 1, and is screw-threaded at its outer extremity to receive an adjusting nut 16; the actuating gear wheels being shown in section on a plane passing through their centers. A spring 17 surrounds the bolt 15 and abuts against a-shoulder formed by the fork 1 1 and the adjacent face of the base. this spring normally acting to move the frame 10 around the spindle 9 an axis away from the diaphragm 3.

611 the spindle 9 are loosely mounted a small gear 19., and a large gear 20 rigidly connected by a sleeve 18. Journaled in the arms of the frame 10 and extending parallel with the spindle or shaft 9 is a second spindle 21 having loosely-mounted thereon, a large gear 23 meshing with the gear 19, and

a small ratchet gear 24. The said gear 23 and ratchet 24 are rigidly'connected preferably by a sleeve 22. The shaft 21 has also an arm rigid thereon and carrying a pawl 27 guided in :1 lug 26 and pressed into engagement with the ratchet wheel 24 by a spring 28. The shaft 21 also carries another loosely-mounted sleeve 29, having rigid therewith a small gear 30, meshing with the gear 20, and a diaphragm vibrating member in the form of a large gear or cam wheel having teeth provided with inclined surfaces to engage the wear-piece 6 and force the diaphragm into vibration- Preferably the three sleeves with the gear- 'ing carried thereby, as well as the arm 25,

are all mounted'between the arms of the frame 10, so as to save space and make a compact arrangement of parts. A great saving of space is also secured by mounting the cam, arm, and ratchet, all so as to move about the same axis and be supported by the same shaft.

The shaft 21 extends outward on both sidesof the frame 10 and its extremities proj ect through openings 32 in a casing or cover 33. On the extremities are secured the hubs 34 of a U-shaped operating handle 35. The casing 33 encases the operating mechanism 7 means from said diaphragm.

'24, and through the multiplyin 19, 20 and and is screwed to the base 1 on the side 01)- posite the projector 2,-the base having an internally-threaded rim 36 for this purpose.

The horn may be mounted adjacent to the seat of the driver on an automobile and to operate the same the'handle may be moved rapidly back and forth. hen moving in one directionthe pawl 27 engages the ratchet g gears 28, 30 the cam wheel 31 is given a rapid rotation. This rotation will be anticlockwise, viewing the parts as shown on Fig. "2, of the wheel 31 will strike the wear-piece 6 and cause the diaphragm to move. After each tooth passes the wearpiece, the resilience of, the diaphragm cafis it to move in the opposite direction, the wear-piece enteringbetween the teeth, as is well known to those skilled in the art.

To vary the amplitude of the forced portions of the vibrations, the frame 10 may be adjusted by the nut 16. When the frame is moved toward the diaphragm, of cam on wearpiece is increased whereas when the frame is moved away from the diaphragm the overlap is less. The movement of the frame is permitted by making the holes 32- larger than the spindle 21, as shown in Figs. 2 and 3, and these holes are covered by the hubs 34:.

From the above description it will be seen that my horn is exceedingly compact, occupying but a small amount of space; the component parts are few and the whole device is easy and cheap to make. Only two shafts are necessary, and the pivotec. frame affords the full range of adjustment that practical conditions require. Further, the casing or cover and the diaphragm completely encase the operating mechanismand protect the same against dust and dirt. d

I wish to have it understood that the horn shown on the drawings represents but one embodiment of my invention; that I do not wish to limit myself to the exact details thereof, but reserve the right to vary the shape, size andarrangement of the parts to the full extent permitted by the scope and spirit of my invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. An improvement of thekind described comprising a diaphragm, a yoke-shaped frame located adjacent said diaphragm, means engaging the arms of said yoke-shaped frame, for pivotally mounting said frame, means supported by said frame for vibratmg said diaphragm, and adjusting means engaging the shank of saidyoke-shaped frame to vary the distance of said'vibrating 2. An improvement of the and the inclined faces of the cams the overlap kind described 6 comprising a diaphragm, a spindle located diaphragm,an annular adjacent said diaphragm, a yoke-shaped frame having its arms pivotally mounted by means of said spindle, said frame carrying a second spindle, means on said second spindle for vibrating the diaphragm, multiplylng gearing carried by said spindles for actuating the vibrating means, means for setting the multiplying gearing in rotation, and adjusting means engaging the shank of said yoke-shaped frame to vary the distance of said vibrating means from said diaphragm.

3. An improvement of the kind described comprising a diaphragm, a frame mounted adjacent said diaphragm, a spindle carried by the frame, an arm having a springactuated dog rigid with said spindle, a pinion engaged by the dog loosely mounted on the spindle, a large gear rigid withthe pinion and also loosely mounted on the spindle, a second spindle, a sleeve thereon, a pinion rigid with the sleeve and meshing with the large gear, a large gear rigid with said sleeve. a toothed wheel loosely mounted on the first spindle, for vibrating the diaphragm, said wheel having a pinion rigid therewith to beoperated by the second large gear.

4. A signaling device including a diaphragm, an annular diaphragm supporting member, a frame pivotally secured to said member adjacent to one edge of said diaphragm, and having a shaft carried thereby intermediate of its ends and parallel to the pivotal support of said frame, a diaphragm vibrating member concentric with said shaft, means for turning said shaft anddriving connections between said shaft and said dialoosely mounted phragm vibrating member, said connections including a rotatable member concentric with said pivotal support and receiving power from said shaft and delivering power to the diaphragm vibrating member on said shaft.

5. A signaling device including a diaphragm, an annular diaphragm supporting member, a casing secured to said member, a spindle carried by said member independently of said casing, a frame supported by said spindle and movable about the latter as an axis, a shaft carried by said frame and having its opposite ends projecting outthrough the opposite sides of said casing, means upon the outer end of said shaft for turning the latter, a diaphragm vibrating member loosely mounted on said shaft, a gear loosely mounted on said shaft, a gear member loosely mounted on said spindle and serving to transmit motion from said gear to said diaphragm vibrating member, ratchet and pawl connections between said shaft and said gear for rotating the latter upon turning said shaft in one direction."

6. A signaling apparatus comprising a diaphragm supporting member, a casing secured to said member adjacent to the periphery of the diaphragm, a movable frame within said casing, a shaft supported thereby, said casing having an opening on one side thereof larger than said shaft and through which said shaft extends, a handle member outside of said casing, and connected with said shaft for oscillating the latter, a diaphragm vibrating member loosely mounted on said shaft, a gear loosely mounted on said shaft and having a'ratchet wheel rigid therewith, an arm carried by said shaft and having a pawl for engagement with said ratchet wheel, means for transmitting motion from said gear to said diaphragm vibrating member, and means for bodily adjusting said frame to vary the relative positions of said diaphragm and diaphragm vibrating memshaft and engaging the impact piece for vibrating the diaphragm, driving connections between said ratchet and said cam, an arm carried by said shaft, a pawl at the end of the arm engaging said ratchet, and means actuated by the operator to move said arm and pawl in. one, direction to rotate said toothed member, the pawl riding idly over the ratchet in'its return movement.

9. A signaling device having in combination an elastic diaphragm, a shaft, a ratchet loosely mounted thereon, a toothed member for vibrating the diaphragm loosely mounted on the same shaft, driving connections between said ratchet, and said toothed member, an oscillating pawl carried by said shaft for driving said ratchet in one direction only for the purpose described.

10. A signaling device including a diaphragm, a cylindrical casing in the rear of said diaphragm and having an open end rigidly supported in respect to the peripheral portion of said diaphragm, a shaft within said casing and disposed substantially parallel to said diaphragm and bodily adjustable toward and from the latter, a ratchet wheel, a diaphragm vibrating cam, and an arm, all three being coaxial and rotatable about said shaft as the center, a

spring pressed pawl carried by said arm and engaging with said ratchet, driving connections between said ratchet and said cam, a

handle outside of'said casing and movable back and forth, and operative connections lietween said handle and said arm for 05- cillating the latter, and .imparting rotation of said cam when moved in one direction, said pawl riding idly over the ratchet when moved in the opposite direction. 11. A signaling device including a diaphragm, a shaft disposed substantially parallel to said diaphragm, and supporting a ratchet wheel, a diaphragm vibrating cam and an arm, all three being coaxial and movable about said shaft as the center, a spring pressed pawl carried by said armto engage with said ratchet, driving connections between said ratchet and said cam,

means for oscillating said shaft and thereby imparting back and forth movement to said arm, the pawl on said arm imparting rotation to said ratchet during movement in one direction and riding idly over said ratchet when moving in the opposite direction.

12. An alarm or signaling device of the class described, including an elastic diaphragm, an impact piece on said diaphragm, a rotary cam for vibrating said diaphragm,

' I and a pawl and ratchet driver therefor, in

combination with an oscillatory shaft and means for effecting oscillatory movement thereof, said shaft having said rotary cam and said ratchet loosely mounted thereon and said shaft being free to rotate in the reverse direction independently thereof, and having the pawl in operative relation to said ratchet and secured to said shaft so as to oscillate therewith.

13. An alarm or signaling device of the class described; including an elastic diaphragm, an impact piece on said diaphragm, a rotary cam for vibrating said diaphragm, and a pawl and ratchet driver therefor, in combination with an oscillatory shaft and means for effecting oscillatory movement thereof, said shaft having said rotary cam and one member of said pawl and ratchet driver loosely mounted thereon, and said shaft biiig free to rotate in the reverse direction independently thereof, and having the other member of said frame and ratchet driver in operative relation to the first men- 'tioned member and secured to said shaft so as to oscillate therewith.

Signed at Brooklyn, in the county of Kings and State 'of New York, this 15th day of April A. I). 1912. I

HENRY \V. BENDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! I'atentl, walhlnztonfl). 0." 

